Blowpipe.



O. E. JOHNSON.

i BLowPIPE. APPLICATION FILED NOV. 16. 1911.

1,038,381 Patented sepa 10,1912. f

i cHAnLEsn JOHNSON, `or ,"H'AvELoox, NEBRASRA' nLow'rIrE. "j i To all inkom 1f-maj] concern Be it known that I, CHARLES E. JOHNSON,

t a citizen of th United States, residing at reference characters. t

Havelock, in the county of Lancaster and State of Nebraskakhave invented certain new and useful Improvements in Blowpipes,

of which the following is a specification.

This invention 'involves' improvements iny welding 'tools' and pertains particularly to, that class of devices ordinarily called blow pipes whereby the welding process yis effected by the combustion of oxygen and acetylene gas.

The object 'of the invention is to provide a' simple and eiiicient device for the above pur-v pose which will readilyk permitv of` cleansing and which is easily adapted to be changed for regulating the'fla'me to be produced accordingt-o the character of work for which it 4is desired. J A further object of the invention `is to provide a. novel 'mixer whereby the fuel or gases are interinixed in a most efficient manner to produce the character and intensity' of yflame that may be desired. I f.

With the above and other objects in view,I this invention consists ofthe construction, combination, andarrangement of parts, all as hereinafter more fully described, claimed and illustrated in the accompanying drawings, wherein 1 Figure l1- is alongitudinal sectional view of the tool constructed in accordance with the preferred form of my invention; Fig. v2 is a verticalse'cti-onal,View of the mixer; Fig.'3 is a view on the line 3-3 of Fig. 2 looking in the direction ofthe-arrow; Fig. l isV a view onthe line 3-3 ofv 'Figl 2 looking in the opposite direction to that of' Fig.I 3; Fig. 5 is'a view on the line -5-5 of Fig. 2.

Throughout the following detail description and on the several lguresiof the drawings, similar parts are referred to by like Referring now to the ldrawings, A -desig-` nates a supply pipe or conduit forv the passage of gas, in this instance oxygen,therethrough, into one end ofv which is screwed Acetylene gas in conveyed-through thel iexi- I ble tubing 2 into the nipple 1'- which is also 'provided with the usual .stop cock 3', said i nipple 1 being screwedinto the lower end of the enlarged casing B,Ethe'/f/:asing.being provided'therein at its opposite ends with the' screens ror-.ilters 4 between which 'is 1ocated the packing of asbestos or mineral wool indicated at 11. The upper end -of the asingfB is-internally threaded to receive an.- extension pipe 5, and the. upper ends of v n the pipes 5 and A arescrewedintothemixing'. chamber 6 extending horiz-ontallyat an angle tosaid pipes.. .The chamber 6 is cy-- -lindrieal 1n 'form and eomprises'thev hollow portion'T-which narrows or tapersat' one end to the s ho-rt longitudinal bore or passage 8,'commun1cating withthe pipe}A.

, I Into the hollow portion 7 is adapted to bereceivedl a mixer 9 of somewhat smaller diameter than.. the hollow portion 7 above noted. The mixer 9' is composed Aof cylin-v drical sectlons 10 and-,10Q` each being resage being reduced atrthe end 11 to form a flat slot or passage 13. The section 10 has,

'corresponding to the passageA 12 and in alinenient therewith, a bore or'passage 12.

14 and 14 which maybe suitably secured 'tosaid jendp'ortions ley-soldering or other.-

wise. this construction 'of mixer being 'devised to permitl the ready lcleansing of oper ings or passages therethrough. Across-the' 'face of the. section 10, .or .in other words, the

Collar and end portionslland 11 is averf tical groove 15, as most clearly shown in F 3 of the drawings,land the sections 10 andll are connected b-ylmeans of the dowel pins 16. When thus connected, the grooveV 15 forms transversely arranged passages between sa-idsections `l() and l0"leading from the hollow portion-7 in the chamber 6, said passages being intersected .at their 'inner .ends bythe longitudinal-passages 12 and 13 leadingv from the supply pipe A.y As above4 premised, the mixer 9 thus described 1s adapted to be inserted into the hollow p0rtion 7 of the chamber 6, the latter being iiiternallythreaded at one end thereof to r9.-A

n'o o ceive the detachable burner tip 17 which has 'extending therethrough Athe axial lonsul ' `ing'gto the character of work with which-it gitudinal bore or passage 18. The inner end of the tip 17 seats against the outer reduced end of the section 10', thus holding the same in position vin the'hollow port-ion 7 and when the parts are thus secured in position, the passages 12, 13, 13 4and 12 are in alinement with the passage 8 and form la continuouAs passage leading' from the supply pipe. As willIbe clearly. noted from Fig. 1 of the drawing, the acetylene4 gas passes from the pipe '5.into the hollow portion 71 of the chamber 6 and through the passages 15 in diametrically lopposite ldirections whereit is intersectedand mixed with the oxygen pass- .ing from the pipe yA through thepassages 8 and 12". The mixture thus. takes place at1 right'angles insuring ai vmost thorough com\ mingling vof the gases which then pass through the passages 13 andl 12 into the passage 18 in the tip 17 from which they are emittedto produce `the 'welding Haine. cle-.

Siv'fgd, g u I As will be readily understoodi by those skilled in the art to which-this invention appertains, the flame may be suitably regu` lated by means of-th stop cocks'3 and 3 andthe length and intensity vof vthe flame willbefurther governed pby the use of different size mixers and burner tips, .accordniay be used.

t will be ap arentthatfthe supply pi 'e A and the acety ene gas pipe comprising t e r pipe, the other casing Byand the extension 5 will constitute a'handle by which the ldevicemay.be manipulated in the use'of the 'same Havingl 'thusfullyidesc'ribed the 4invention, what is claimedgas new isz---Iy In a blow pipe, oxygen and acety ene supply pipes, fa mixing chamber secured' to said pipes having a f hollow portion in the body thereof tapering at one end andvterminating in a. passage communicating with. the oxygen supply end being internally threaded, a mixer adapted to be received `Vinto the 4hollow lportion .'aforesaid, said the combination of' mixer having oppositely tapering end portions and a longitudinal passage therethrough communicating with the first mentioned passage and having also transversely arranged passages connecting at their inner ends with the longitudinal passage aforesaid, and a detachable burner tip having a passage'therethrougli adapted to be screw ed into the chamber and having its inner end recessed to conform to the outer tapered end of theA mixer, whereby the latter is positioned -in the chamber aforesaid anda continuous passage is formed from the oxygen supply. pipe.v l l 2. In. a blow pipe, the combination of oxygen and acetylene supply pipes,'a mixing-chamber secured to said pipes .having a hollow portion'in the body .thereof tapering at oneend and terminating in a passage communica-ting .with the oxygen supp yy pipe, the 'other end being internally threaded, a removable .mixer adaptedto be received into the hollow portion aforesaid, 'said mixer'comprising sectionshaving their opposite ends tapered and having passages therethrough, the inner contiguous ends 0f the sections being reduced, collars mounted f on said reduced ends, and means connecting said collars .to thereby'join vsaid sections together, the inner face ofpo'ne of said sections hav-mg a groove extending thereacross forming a transverse. passage intersecting lthe passages through the sections aforesaid,

a detachable burner tip screwed into the threaded end Aof said-chamber and having a passage therethrough communicating with the passages in sai sections, the inner end of said burner tip being recessedto receive the outer reduced end of the mixer and thereby position the latter centrally in the. chamber aforesaid.

In testimony whereof Ilaiiix my signature in p resence of two witnesses.

CHARLES E. JOHNSON.'

. Vitnesses FRANK W. TITLER, 4Grim'. F. PRENTIss.

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